//
// Mixins
// --------------------------------------------------

// UTILITY MIXINS
// --------------------------------------------------

// Clearfix
// --------
// For clearing floats like a boss h5bp.com/q
.clearfix() {
	*zoom: 1;
	&:before,
	&:after {
		display: table;
		content: "";
		// Fixes Opera/contenteditable bug:
		// http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952
		line-height: 0;
	}
	&:after {
		clear: both;
	}
}

// Webkit-style focus
// ------------------
.tab-focus() {
	// Default
	outline: thin dotted #333;
	// Webkit
	outline: 5px auto -webkit-focus-ring-color;
	outline-offset: -2px;
}

// Center-align a block level element
// ----------------------------------
.center-block() {
	display: block;
	margin-left: auto;
	margin-right: auto;
}

// IE7 inline-block
// ----------------
.ie7-inline-block() {
	*display: inline; /* IE7 inline-block hack */
	*zoom: 1;
}

// IE7 likes to collapse whitespace on either side of the inline-block elements.
// Ems because we're attempting to match the width of a space character. Left
// version is for form buttons, which typically come after other elements, and
// right version is for icons, which come before. Applying both is ok, but it will
// mean that space between those elements will be .6em (~2 space characters) in IE7,
// instead of the 1 space in other browsers.
.ie7-restore-left-whitespace() {
	*margin-left: .3em;

	&:first-child {
		*margin-left: 0;
	}
}

.ie7-restore-right-whitespace() {
	*margin-right: .3em;
}

// Sizing shortcuts
// -------------------------
.size(@height, @width) {
	width: @width;
	height: @height;
}
.square(@size) {
	.size(@size, @size);
}

// Placeholder text
// -------------------------
.placeholder(@color: @placeholderText) {
	&:-moz-placeholder {
		color: @color;
	}
	&:-ms-input-placeholder {
		color: @color;
	}
	&::-webkit-input-placeholder {
		color: @color;
	}
}

// Text overflow
// -------------------------
// Requires inline-block or block for proper styling
.text-overflow() {
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

// CSS image replacement
// -------------------------
// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
.hide-text() {
	font: 0/0 a;
	color: transparent;
	text-shadow: none;
	background-color: transparent;
	border: 0;
}

// FONTS
// --------------------------------------------------

#font {
	#family {
		.serif() {
			font-family: @serifFontFamily;
		}
		.sans-serif() {
			font-family: @sansFontFamily;
		}
		.monospace() {
			font-family: @monoFontFamily;
		}
	}
	.shorthand(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
		font-size: @size;
		font-weight: @weight;
		line-height: @lineHeight;
	}
	.serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
		#font > #family > .serif;
		#font > .shorthand(@size, @weight, @lineHeight);
	}
	.sans-serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
		#font > #family > .sans-serif;
		#font > .shorthand(@size, @weight, @lineHeight);
	}
	.monospace(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
		#font > #family > .monospace;
		#font > .shorthand(@size, @weight, @lineHeight);
	}
}

// FORMS
// --------------------------------------------------

// Block level inputs
.input-block-level() {
	display: block;
	width: 100%;
	min-height: 30px; // Make inputs at least the height of their button counterpart
	.box-sizing(border-box); // Makes inputs behave like true block-level elements
}

// Mixin for form field states
.formFieldState(@textColor: #555, @borderColor: #ccc, @backgroundColor: #f5f5f5) {
	// Set the text color
	> label,
	.help-block,
	.help-inline {
		color: @textColor;
	}
	// Style inputs accordingly
	.checkbox,
	.radio,
	input,
	select,
	textarea {
		color: @textColor;
		border-color: @borderColor;
		.box-shadow(inset 0 1px 1px rgba(0, 0, 0, .075)); // Redeclare so transitions work
		&:focus {
			border-color: darken(@borderColor, 10%);
			// Write out in full since the lighten() function isn't easily escaped
			-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 6px lighten(@borderColor, 20%);
			-moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 6px lighten(@borderColor, 20%);
			box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 6px lighten(@borderColor, 20%);
		}
	}
	// Give a small background color for input-prepend/-append
	.input-prepend .add-on,
	.input-append .add-on {
		color: @textColor;
		background-color: @backgroundColor;
		border-color: @textColor;
	}
}

// CSS3 PROPERTIES
// --------------------------------------------------

// Border Radius
.border-radius(@radius) {
	-webkit-border-radius: @radius;
	-moz-border-radius: @radius;
	border-radius: @radius;
}

// Single Corner Border Radius
.border-top-left-radius(@radius) {
	-webkit-border-top-left-radius: @radius;
	-moz-border-radius-topleft: @radius;
	border-top-left-radius: @radius;
}
.border-top-right-radius(@radius) {
	-webkit-border-top-right-radius: @radius;
	-moz-border-radius-topright: @radius;
	border-top-right-radius: @radius;
}
.border-bottom-right-radius(@radius) {
	-webkit-border-bottom-right-radius: @radius;
	-moz-border-radius-bottomright: @radius;
	border-bottom-right-radius: @radius;
}
.border-bottom-left-radius(@radius) {
	-webkit-border-bottom-left-radius: @radius;
	-moz-border-radius-bottomleft: @radius;
	border-bottom-left-radius: @radius;
}

// Single Side Border Radius
.border-top-radius(@radius) {
	.border-top-right-radius(@radius);
	.border-top-left-radius(@radius);
}
.border-right-radius(@radius) {
	.border-top-right-radius(@radius);
	.border-bottom-right-radius(@radius);
}
.border-bottom-radius(@radius) {
	.border-bottom-right-radius(@radius);
	.border-bottom-left-radius(@radius);
}
.border-left-radius(@radius) {
	.border-top-left-radius(@radius);
	.border-bottom-left-radius(@radius);
}

// Drop shadows
.box-shadow(@shadow) {
	-webkit-box-shadow: @shadow;
	-moz-box-shadow: @shadow;
	box-shadow: @shadow;
}

// Transitions
.transition(@transition) {
	-webkit-transition: @transition;
	-moz-transition: @transition;
	-o-transition: @transition;
	transition: @transition;
}

// Transformations
.rotate(@degrees) {
	-webkit-transform: rotate(@degrees);
	-moz-transform: rotate(@degrees);
	-ms-transform: rotate(@degrees);
	-o-transform: rotate(@degrees);
	transform: rotate(@degrees);
}
.scale(@ratio) {
	-webkit-transform: scale(@ratio);
	-moz-transform: scale(@ratio);
	-ms-transform: scale(@ratio);
	-o-transform: scale(@ratio);
	transform: scale(@ratio);
}
.translate(@x, @y) {
	-webkit-transform: translate(@x, @y);
	-moz-transform: translate(@x, @y);
	-ms-transform: translate(@x, @y);
	-o-transform: translate(@x, @y);
	transform: translate(@x, @y);
}
.skew(@x, @y) {
	-webkit-transform: skew(@x, @y);
	-moz-transform: skew(@x, @y);
	-ms-transform: skew(@x, @y);
	-o-transform: skew(@x, @y);
	transform: skew(@x, @y);
}
.translate3d(@x, @y, @z) {
	-webkit-transform: translate3d(@x, @y, @z);
	-moz-transform: translate3d(@x, @y, @z);
	-o-transform: translate3d(@x, @y, @z);
	transform: translate3d(@x, @y, @z);
}

// Backface visibility
// Prevent browsers from flickering when using CSS 3D transforms.
// Default value is `visible`, but can be changed to `hidden
// See git pull https://github.com/dannykeane/bootstrap.git backface-visibility for examples
.backface-visibility(@visibility) {
	-webkit-backface-visibility: @visibility;
	-moz-backface-visibility: @visibility;
	backface-visibility: @visibility;
}

// Background clipping
// Heads up: FF 3.6 and under need "padding" instead of "padding-box"
.background-clip(@clip) {
	-webkit-background-clip: @clip;
	-moz-background-clip: @clip;
	background-clip: @clip;
}

// Background sizing
.background-size(@size) {
	-webkit-background-size: @size;
	-moz-background-size: @size;
	-o-background-size: @size;
	background-size: @size;
}

// Box sizing
.box-sizing(@boxmodel) {
	-webkit-box-sizing: @boxmodel;
	-moz-box-sizing: @boxmodel;
	box-sizing: @boxmodel;
}

// User select
// For selecting text on the page
.user-select(@select) {
	-webkit-user-select: @select;
	-moz-user-select: @select;
	-ms-user-select: @select;
	-o-user-select: @select;
	user-select: @select;
}

// Resize anything
.resizable(@direction) {
	resize: @direction; // Options: horizontal, vertical, both
	overflow: auto; // Safari fix
}

// CSS3 Content Columns
.content-columns(@columnCount, @columnGap: @gridGutterWidth) {
	-webkit-column-count: @columnCount;
	-moz-column-count: @columnCount;
	column-count: @columnCount;
	-webkit-column-gap: @columnGap;
	-moz-column-gap: @columnGap;
	column-gap: @columnGap;
}

// Optional hyphenation
.hyphens(@mode: auto) {
	word-wrap: break-word;
	-webkit-hyphens: @mode;
	-moz-hyphens: @mode;
	-ms-hyphens: @mode;
	-o-hyphens: @mode;
	hyphens: @mode;
}

// Opacity
.opacity(@opacity) {
	opacity: @opacity / 100;
	filter: ~"alpha(opacity=@{opacity})";
}

// BACKGROUNDS
// --------------------------------------------------

// Add an alphatransparency value to any background or border color (via Elyse Holladay)
#translucent {
	.background(@color: @white, @alpha: 1) {
		background-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
	}
	.border(@color: @white, @alpha: 1) {
		border-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
		.background-clip(padding-box);
	}
}

// Gradient Bar Colors for buttons and alerts
.gradientBar(@primaryColor, @secondaryColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
	color: @textColor;
	text-shadow: @textShadow;
	#gradient > .vertical(@primaryColor, @secondaryColor);
	border-color: @secondaryColor @secondaryColor darken(@secondaryColor, 15%);
	border-color: rgba(0, 0, 0, .1) rgba(0, 0, 0, .1) fadein(rgba(0, 0, 0, .1), 15%);
}

// Gradients
#gradient {
	.horizontal(@startColor: #555, @endColor: #333) {
		background-color: @endColor;
		background-image: -moz-linear-gradient(left, @startColor, @endColor); // FF 3.6+
		background-image: -webkit-gradient(linear, 0 0, 100% 0, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
		background-image: -webkit-linear-gradient(left, @startColor, @endColor); // Safari 5.1+, Chrome 10+
		background-image: -o-linear-gradient(left, @startColor, @endColor); // Opera 11.10
		background-image: linear-gradient(to right, @startColor, @endColor); // Standard, IE10
		background-repeat: repeat-x;
		filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@startColor), argb(@endColor))); // IE9 and down
	}
	.vertical(@startColor: #555, @endColor: #333) {
		background-color: mix(@startColor, @endColor, 60%);
		background-image: -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
		background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
		background-image: -webkit-linear-gradient(top, @startColor, @endColor); // Safari 5.1+, Chrome 10+
		background-image: -o-linear-gradient(top, @startColor, @endColor); // Opera 11.10
		background-image: linear-gradient(to bottom, @startColor, @endColor); // Standard, IE10
		background-repeat: repeat-x;
		filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor), argb(@endColor))); // IE9 and down
	}
	.directional(@startColor: #555, @endColor: #333, @deg: 45deg) {
		background-color: @endColor;
		background-repeat: repeat-x;
		background-image: -moz-linear-gradient(@deg, @startColor, @endColor); // FF 3.6+
		background-image: -webkit-linear-gradient(@deg, @startColor, @endColor); // Safari 5.1+, Chrome 10+
		background-image: -o-linear-gradient(@deg, @startColor, @endColor); // Opera 11.10
		background-image: linear-gradient(@deg, @startColor, @endColor); // Standard, IE10
	}
	.vertical-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 50%, @endColor: #c3325f) {
		background-color: mix(@midColor, @endColor, 80%);
		background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
		background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
		background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop*100%, @endColor);
		background-image: -o-linear-gradient(@startColor, @midColor @colorStop, @endColor);
		background-image: linear-gradient(@startColor, @midColor @colorStop, @endColor);
		background-repeat: no-repeat;
		filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor), argb(@endColor))); // IE9 and down, gets no color-stop at all for proper fallback
	}
	.radial(@innerColor: #555, @outerColor: #333) {
		background-color: @outerColor;
		background-image: -webkit-gradient(radial, center center, 0, center center, 460, from(@innerColor), to(@outerColor));
		background-image: -webkit-radial-gradient(circle, @innerColor, @outerColor);
		background-image: -moz-radial-gradient(circle, @innerColor, @outerColor);
		background-image: -o-radial-gradient(circle, @innerColor, @outerColor);
		background-repeat: no-repeat;
	}
	.striped(@color, @angle: 45deg) {
		background-color: @color;
		background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, rgba(255, 255, 255, .15)), color-stop(.25, transparent), color-stop(.5, transparent), color-stop(.5, rgba(255, 255, 255, .15)), color-stop(.75, rgba(255, 255, 255, .15)), color-stop(.75, transparent), to(transparent));
		background-image: -webkit-linear-gradient(@angle, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
		background-image: -moz-linear-gradient(@angle, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
		background-image: -o-linear-gradient(@angle, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
		background-image: linear-gradient(@angle, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
	}
}
// Reset filters for IE
.reset-filter() {
	filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
}

// Button backgrounds
// ------------------
.buttonBackground(@startColor, @endColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
	// gradientBar will set the background to a pleasing blend of these, to support IE<=9
	.gradientBar(@startColor, @endColor, @textColor, @textShadow);
	*background-color: @endColor; /* Darken IE7 buttons by default so they stand out more given they won't have borders */
	.reset-filter();

	// in these cases the gradient won't cover the background, so we override
	&:hover, &:active, &.active, &.disabled, &[disabled] {
		color: @textColor;
		background-color: @endColor;
		*background-color: darken(@endColor, 5%);
	}

	// IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
	&:active,
	&.active {
		background-color: darken(@endColor, 10%) e("\9");
	}
}

.transition-duration(@transition) {
	-webkit-transition-duration: @transition;
	-moz-transition-duration: @transition;
	-o-transition-duration: @transition;
	transition-duration: @transition;
}
